I have also been using Numpy's save function to do the same thing. numpy.save() and numpy.load() is so much simpler, however. I really recommend that people use numpy.save() and numpy.load() over cPickles for most purposes. It is so much more simple.

I always thought a cPickle was much, much faster than Numpy, but I guess I was wrong, according to this stackoverflow I just saw. Below are loading and saving times for a large array. Practically no difference between Numpy and cPickles!